They have brilliant hearing which warns them about dangers
Ears help rabbits to hear, of course! (But if it is arctic hare, even though it may hear better, it does not keep warmth inside.) Rabbits also use their ears to communicate with. They can move them backwards and forwards, lock them to the side, and they can rotate them so that the openings face one way or another -- the different positions mean different things to other rabbits.
There are many rabbits with ears sticking up. My Netherland dwarf rabbit, which is the smallest rabbit, has upright ears. Also dutch rabbits and rex rabbits do, to name some. Hope this is of some help :)
camouflage helps rabbits survive by blending into their surroundings.
Dessert rabbits, like all rabbits, have big ears to help regulate their body temperature. The large surface area of their ears allow them to dissipate heat more effectively, keeping them cool in hot environments like desserts. Additionally, their big ears also help them hear predators and other threats approaching from a distance.
The plural form for rabbit ears is (one) rabbit's ears; or (two) rabbits' ears.
A mouse has small ears but their small ears can help them hear things that are quite far away.
True
It's not true that rabbits with long ears have a longer lifespan than rabbits with short ears. Ear length has no bearing on a rabbit's lifespan.
Because they are differently shaped, molded to help them survive in their habitats.
It depends on its species and size. Tiny rabbits have tiny ears.
No, a common misconception. Look up a picture of an "enlgish lop" sometime. Very very long ears (22 inch span). This breed in particular originated in Africa. The ears on any rabbit are to release heat. They are like a built in AC. With so much surface area, the heat given off allows long eared breeds to survive in hotter climates better. Dwarf rabbits, who's ears are the smallest, are that way to conserve heat. With less surface area the ears don't give off as much heat and allow the rabbit to survive better in colder climates.
Rabbits use their long ears to detect predators, regulate their body temperature, and communicate with other rabbits. The large surface area of their ears helps them dissipate heat, keeping them cool in hot weather. Additionally, their acute hearing allows them to hear approaching threats from a distance, giving them time to escape.